Patents by Inventor Istvan Bitteer

Istvan Bitteer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Antiallergic nitrogen bridge-head compounds
    Patent number: 4260612
    Abstract: Antiallergic and antiasthmatic compounds of the formula ##STR1## of which 9-phenylamino-6-methyl-4-oxo-6,7-dihydro-4H-pyrido(1,2-a)pyrimidine-3-carb oxylic acid and optically active antipodes and salts thereof are examples.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: April 7, 1981
    Assignee: Chinoin Gyogyszer es Vecyeszeti Termekek Gyara Rt.
    Inventors: Istvan Hermecz, Zoltan Meszaros, Tibor Breining, Sandor Virag, Lelle Vasvari nee Debreczi, Agnes Horvath, Gabor Nagy, Attila Mandi, Tamas Szuts, Istvan Bitteer, Gyula Sebestyen